Electrical regulator.



O. S. SCHAIRER.

ELECTRICAL REGULATOR.

APPLlCATlON FILED OCT. 5. 19!!- Patented July 20, 1915.

'- lNVENTOR mama? WiTNESSES:

l e ras rar rlnr ilii li) S. SCHAIRER, OF EDGEWOOD PARK, PENNSYLVANIA, ASSIGNOR TO WESTING HOUSE ELEQ'LEIC AND MANUFAGTUBING CQMPANY, A CORPQRATION GE PENE- SYLVANIA.

ELECTRIC-113 BEGULATGR.

To all whomit may concern:

Be it known that l, OTTO S. SGHAIRER; a citizen of the United States, and a resident of Edgewood Park in. the county Allegheny and State of Permsyivania, have invent'ed a new and useful improvement in Electrical Regulators, oiwhich the follow ing is a specification.

My invention relates to voltage current regulators, and it has for yrovide a simple and effective regulator the field excitation of a dynamo-electric machine.

My invention. is illustrate in the accornpanying drawing, Figure l of which is a dia grammaticview of a system embodying same; Fig. 2 is a similar view-oi a modification of a portion of the system of 1, and Fig. 3 other modification of the system.

As illustrated, the system in connection with which the present invention employed comprises a generator 1 that is connected to a distributing circuit 2-34l and the field magnet 5 or" which is supplied from the armature 6 of an exciter having a field magnet winding 7 that is shunt excited, or

that may be excited from any other suitable source.

The regulator comprises two cooperating movable contact members 8 and 8 that are respectively carried by levers 9 and 10, the lever 9 being actuated by an electro-inagnet winding 11 that receives energizing current from the distributing circuit 23-4C. The bore 12 of the Winding 11 is partially counterbalanced by an adjustable counter-weight 13,and the movements or" the lever 9 and contact member 8 are retarded by means of a dash pot 14. The winding 11 is energized to varying degrees by variations of the voltage of the circuit 2-34, and accordingly raises and lowers the core 12, thereby varying the distance of the contact member 8 ifromthe member 8 -'If desired. instead. oi supplying the winding 11 with current pic bortienal to the vcltage of the circuit it may be connected in: series with one oi" the conductors of the said'circuit or Specification of Letters Patent.

7 windi is a diagrammatic view of still,an-

Patented July 20, 1915.

Application filed October 5, 1911. Serial No. 652,985.

otherwise suitably supplied with current 1 z. that in proportional to that traversing the said circuit.

.ble means. i he auxiliary led with a field magnet degree of excltation of which in substantially the same manner is degse of excitation of the tor ield inding. To this end, been .i as connected in series 'held magnet windin 7. of energization of the winding osition oil the contact me ber 8 "eh the voltage 'o'l the auxil ary encratcr. X in series with the field magnet windings i and 18 a resistor that is adapted to, be

mg a stationary contact member and a coatter being actuated by a winding 25, the ircnit'of which is made and broken by the engagement and disengagement oi the cont ct members 8 S. The said winding receives its energizing current "from the armature of the auxiliary generator.

. 1n the operation of the regulator, the position of the contact member 8 is caused, by

the winding 11, to vary with the voltage ofand closing of the shunt circuit to the re-. sister 22. Thus, if the voltage of the circuit 23---s dimmishes, the contact terminal 8 will be raised. and, by. reason cf its engage hu. ted by means of a relay device comprisf fps-rating movable contact member 2%, the

. with the electrical condition of'the distribment with the contact terminal 8*, the relay winding 25 will be energized and will cause engagement of theterminal members 23 and 24. The establishment, in this manner, of a shunt to the resistor 22 causes'the field magnet windings 7 and 20 to be more strongly excited, thereby in turn raising the voltages of both the exciter and auxiliary generator. The increase of theexciter voltage .correspondingly increases the excitation of the main generator field magnet winding 5, thereby tending to raise the voltage of the said generator. By reason of the increase of the voltage of the auxiliary generator, the

magnet winding 18 is more strongly ener-' gized and the contact terminal 8 1s oved out of engagement with the member-8. The contact terminals 23 and 24; thereby also become separated and the shunt circuit to the resistor 22 is interrupted. The result of this isthat the excitations and voltages of the exciter and auxiliary generator are diminished and the contact member 8" is again moved into engagement with the member 8. As the contact member 8 varies in position uting circuit, the periods of engagement and disengagement of the said member with the member 8 will correspondingly vary, with the result that the excitation of the main generator will, by a proper construction and adjustment of the apparatus, be caused to vary in such a manner as to maintain the voltage, or other desired electrical condition of the generator, substantially constant or at a required value.

Instead of connecting the field magnet winding 20 of the auxiliary generator in series with the field magnet winding of the iary generator is also shown as driven by a- -to the distributing circuit 2.3l. The' 6'0 exciter, it may be connected across the exciter armature, so that its excitation will vary substantially as the exciter voltage. WVith this arrangement ofconnections, the variations of the excitation of the auxiliary generator will, of course, be delayed slightly with respect to the fluctuations of the exciter voltage, but will not .be' delayed as much as the'excitation of the field of the main generator, because the inductance of the field of the small generator is much less than that of the field of the main generator.

In Fig. 3, the respective field magnet windings 7 and 20 of the exciter and of the auxiliary generator, are connected in paral- -le1, and the excitations thereof aregoverned exactly as in Fig. 1. In Fig. 3, -the auxilsmall motor 24 that is preferably connected s'mall motor and auxiliary generator thus form a motor-generator set which may be placed in any desired or convenient location.

In order to secure promptnessand the a" proper degree of regulation of the excitation of the main generator, it is usually necessary "that the exciter voltage be capable of fluctuation between wide limits. On the otherhand it is deslrable that'the voltage applied to the windings 16 and 25 should not fiuctuate so greatly, and this condition is obtainable in the present instance by constructing the exciter and auxiliary generator, and by adjusting the resistances of their field circuits, so that the ranges of their voltages, bear any desired relation to each other. When amotor is employed for driving the auxiliary generator,- the regulator may be readily adapted for use with any main generator or any exciter, irrespective of their voltages, and without change of the regulator coils or others of its parts, by simply employing a transformer of the proper ratio between the circuit 23i' and the said motor. This is of great advantage'to both manufacturer and user, since the regulators maybe carried complete in stock ready for shipment and use and they may be adapted for use under widely varying conditions without modification.

The present regulator may be employed for regulating in accordance with variations of any other electrical condition than voltage, and for many other conditions than that specifically shown, and it may be our 'ployed in connection with direct current i chines, as well as with alternators.

I claim as my invention: i

l. The combination with a dynamo-elem trio machine, an exciter therefor,- and an auxiliary generator that supplies in e. ing current tothe dynamo-electrio inacl' '16, of a regulator for the dynamo-electric machine comprising means for correspondingly regulating therespective voltages of the exciter and the auxiliary generator.

2. The combination. with a dynamo-electrio machine, an exciter therefor, and an auxiliary generator that supplies no exciting current to the dynamo-electric machine, of a regulator for the dynamo-electric mas chine comprising means for correspondingly regulating the respective field excitations of the exciter and the auxiliary generator.

3. The combination with a dynamo-elem.

mfxiliary generator having indeponent In testimony whereof; I have hereunto armature circuits and field magniat windings subssribo. my name this 29th day of So st connected to. a common supply circuit, of a 1911.

regulator for the dynamo-electric machine @TTG S. SCHflRERQ 5 comprising means f0? regulating the reffifinesses:

slstance of the common supply clrcuit-for WESLEY UARR, the sand field magnet wmdmgs. B, 5. harms.

Copies of this patent may in obtsinpd 1e! five cents eaeh, by afixessmg ihe fic amissio oi L Washington, D. Cf? 

